NWS JetStream - Air Pressure
Air Pressure. The atoms and molecules that make up the various layers in the atmosphere are constantly moving in random directions. Despite their tiny size ...

Air Pressure
Air pressure (or atmospheric pressure) refers to the weight of the atmosphere covering a certain area. It can also refer to the whole weight of the Earth?s ...

USA Today: Understanding Air Pressure
Understanding air pressure. The weight of the air pressing down on the Earth, the ocean and on the air below causes air pressure. Earth's gravity, of course, causes ...